Re: [PATCH] Make LIST_POISON less deadly

From: Sam Ravnborg
Date: Mon May 19 2008 - 15:04:16 EST

On Mon, May 19, 2008 at 04:45:03PM +0300, Avi Kivity wrote:
> Ingo Molnar wrote:
> >i'd suggest to add an ARCH_ILLEGAL_POINTER define instead, which
> >defaults to zero and gets added to pointer-ish poison values. That makes
> >it both simpler and also it does not need any include/asm changes
> >because ARCH_ILLEGAL_POINTER can be set from the Kconfig space.
> >
> Any idea how to override a value in Kconfig? We can do it for bool
> values but not strings.
> e.g.
> lib/Kconfig:
> hex
> default 0
> arch/x86/Kconfig:
> config X86
> select ILLEGAL_POINTER_VALUE=0x80000000000000000000000000 if X86_64
> ?
> I could do it with a boolean signifying existence and a hex for the
> value, but I'd rather not.

Sorry - no help here. I have not tried to work that much with int in

That said I really think stuff like this belongs in a header file.
I do not agree to hide this as part of the configuration.

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